Title: Insulation inspection before drywall | Cercha
Description: Learn when Raleigh inspects concealed insulation, what to check before drywall, how to assign repairs, and which records support the handoff.
Canonical: https://cercha.pages.dev/guides/insulation-inspection/
# Insulation inspection before drywall
NC permits and inspections
Obtain framing approval, complete concealed insulation and air-barrier work, and secure the required inspection result before drywall starts.
You need to start drywall after the insulation and air sealing are complete. Raleigh requires framing approval before its concealed-insulation inspection, and that inspection happens before wall or ceiling coverings. Finish the specified concealed work, obtain the recorded approval, and then release the drywall crew. [Raleigh insulation inspection][r-inspect]
## When insulation gets inspected
Raleigh's readiness list places concealed insulation and concealed vapor barriers before coverings. It also lists installed roof boots. Check those items before inspection. The house is not ready just because the insulation crew has left. [City inspection conditions][r-inspect]
Confirm the project's governing code and amendments with the permit authority. OSFM publishes current and past NC editions. Its page still identifies the 2018 NC Residential Code as effective and provides newer-code implementation information. Use the permitted assembly and applicable edition when resolving a disputed requirement. [NC code references][osfm]
Plan inaccessible areas earlier. Durham's inspection guidance, for example, identifies concealed insulation at bathtubs and fireplaces during its sheathing stage, and chases and other concealed areas at full framing. It also requests an installer certification letter for spray foam. These are Durham-specific instructions, not automatic requirements for every Triangle jurisdiction. [Durham inspection stages][durham]
Before sending the crew, ask the GC which areas need an earlier visit. Use [framing inspection](/guides/framing-inspection/) to coordinate the upstream approval and identify rough-in changes that affect the enclosure.
## Check the insulation against the approved schedule
Use the [insulation trade scope](/trades/insulation/) to assign installation, air-barrier interfaces, and return repairs. Start with the approved insulation schedule. Identify the assembly, material, required performance, location, and installation instructions. Different products need different installation checks.
DOE's insulation guide distinguishes batts, loose fill, foam, and other forms and explains that R-value describes resistance to heat flow. [DOE insulation guide][insulation]
Do not treat a product label as a finished installation record. PNNL identifies gaps, voids, compression, and misalignment with the air barrier as insulation-quality defects. Grade I is a quality standard. A local code inspection does not necessarily give the house a RESNET grade. [Insulation-quality guidance][quality]
Use this table to prepare for inspection. Check the work against the approved design and product instructions.
| Area | Check to discuss with the installer | Useful record |
| --- | --- | --- |
| Open wall cavities | Complete fit around obstructions and cavity edges | Context and close photographs |
| Floors and transitions | Continuity at the specified boundary | Assembly detail and location notes |
| Chases and soffits | Air-barrier and insulation responsibility | Accepted interface detail |
| Attic edges | Baffles and the specified insulation arrangement | Product information and exposed condition |
| Late penetrations | Assigned sealing and repair | Completed repair note |
| Spray-applied products | Product-specific installation and documentation | Installer records and required certificates |
Walk irregular cavities with the installer before accepting them. Ask the foreman to show the intended fit at pipes, wires, and framing intersections. Compare the installed condition with the selected product's instructions rather than inventing a universal compression allowance.
See [RESNET insulation grades](/guides/resnet-insulation-grades/) when the project also has an energy-rating requirement. Keep that program's documentation separate from the local inspection result.
## Insulation and air sealing have different jobs
Insulation resists heat flow. Air sealing addresses leakage through gaps and openings. DOE's air-sealing guidance explains the need to treat leakage paths, including penetrations and building interfaces. Installing insulation alone does not establish that those paths are sealed. [DOE air-sealing guide][air]
Name who installs and seals the air barrier. Ask who seals the wall-to-floor transition, plumbing penetrations, wiring routes, and changes around a chase. Ask which products suit each connection, including any required fire-related assembly.
Do not let “the insulator handles it” substitute for a scope. List the locations and the accepted method. If another trade changes a penetration after your walk, have the responsible crew repair it before covering it.
Raleigh's rejection guidance separately identifies missing air barriers and missing fire or draft stopping. List each of these tasks separately, even where they overlap. Confirm the required detail and responsible trade for each. [Published building rejection reasons][r-fail]
Use [trade handoffs](/guides/trade-handoffs/) to document the responsibility boundary. Check the contract before assigning enclosure work. One trade may not handle every task.
## Why drywall waits for approval
Raleigh explicitly schedules insulation inspection before wall or ceiling coverings. Hanging board first removes the visibility the inspection stage expects. Wait for recorded approval before sending the drywall crew. [Before-covering requirement][r-inspect]
Tell the drywall lead exactly what can be covered. Identify the approved inspection, the area it covers, and any conditions still open. If the result is partial or unclear, ask the inspector what can be covered. Do not infer approval for the whole house from a note about one room.
Use the [drywall trade scope](/trades/drywall/) to agree on readiness and protection before board arrives. Give the drywall lead the approved assembly details and identify areas to protect. Ask the crew to report disturbed insulation, damaged barriers, or a missing backing detail before covering the location.
For your own records, attach the inspection result to the handoff. Store installation photographs separately with room and assembly labels. Photos help explain visible conditions; they do not replace the authority's recorded approval.
## Who fixes a failed insulation inspection
Read the defect in the inspection report. Check the subcontract and what caused the defect to decide who repairs it. Use those records to resolve responsibility with the GC instead of assuming every defect belongs to the insulation installer.
Use the [inspection correction workflow](/guides/why-residential-inspections-fail/) to name the repair owner and the evidence needed before reinspection.
You might assign a missed cavity to the insulation installer or a late penetration to the rough-in sub. Ask the GC to obtain the designer's answer about an unclear assembly. Confirm each assignment with the parties before treating it as settled.
For each item, write:
- The exact room or assembly location.
- The inspector's stated deficiency.
- The approved detail or product instruction to follow.
- The person responsible for the correction.
- The work that must remain exposed.
- The evidence and inspection result needed to close it.
PNNL's quality criteria provide useful language for describing installation defects. “Gap beside the pipe in the east wall cavity” gives the returning installer a clearer task than “insulation looks bad.” [Installation-quality terminology][quality]
Ask the GC and responsible designer about defects in the specified material or performance. Request a documented resolution before replacing materials. Use [inspection failure corrections](/guides/why-residential-inspections-fail/) to keep the reinspection request tied to completed work.
## Gather the records before calling drywall
Before calling drywall:
1. Confirm framing approval and the governing insulation schedule.
2. Walk the concealed work with the insulation and air-sealing leads.
3. Resolve damaged or incomplete interfaces with the responsible trades.
4. Gather product identification and permit-required installation documents.
5. Request the correct inspection through the local process.
6. Complete the listed corrections and obtain the required acceptance.
7. Send the drywall lead the recorded release and remaining protection notes.
Keep the product name with the assembly record. DOE notes that installation and material characteristics affect insulation performance. Label photos with the specified product so a reviewer can compare it with the installation. [Insulation forms and performance][insulation]
For projects across the [Triangle](/triangle/), check the site's jurisdiction. Read its inspection stages before using a neighboring city's checklist.
Find related local checkpoints in [NC permits and inspections](/guides/topics/nc-permits-and-inspections/).
## Where Cercha fits
Cercha Search helps you find insulation crews by trade and location. A portfolio can show work before concealment, while Messages supports the scope conversation. Check product records, current credentials, and the local inspection result directly before releasing the next crew.
[r-inspect]: https://raleighnc.gov/permits/services/residential-inspections
[osfm]: https://www.ncosfm.gov/codes/codes-current-and-past
[durham]: https://www.durhamnc.gov/304/Inspection-Requirements
[insulation]: https://www.energy.gov/sites/default/files/2021-11/ES-HomeInsulation_081721E-a.pdf
[quality]: https://basc.pnnl.gov/building-science-measures/insulation-quality-installation
[air]: https://www.energy.gov/sites/default/files/2021-08/ES-Air%20Sealing_080421.pdf
[r-fail]: https://raleighnc.gov/permits/services/failing-inspection-residential-projects
Published 2026.10.14. Updated 2026.10.14.
[More guides: NC permits and inspections]()
## Related guides
- [Framing inspection: what the inspector expects]()
- [Common reasons residential inspections fail in Raleigh]()
- [RESNET insulation grades I, II, and III]()
- [Trade handoffs: who accepts the work before the next crew]()
## Build your connections
[Ask about the beta]()
## Sources
1. City of Raleigh. (2026, October 12). *Residential Inspections*. https://raleighnc.gov/permits/services/residential-inspections
2. North Carolina Office of State Fire Marshal. (n.d.). *Codes - Current and Past*. Retrieved October 14, 2026, from https://www.ncosfm.gov/codes/codes-current-and-past
3. City of Durham. (n.d.). *Inspection Requirements*. Retrieved October 14, 2026, from https://www.durhamnc.gov/304/Inspection-Requirements
4. U.S. Department of Energy. (2021). *Consumer Guide to Home Insulation*. https://www.energy.gov/sites/default/files/2021-11/ES-HomeInsulation_081721E-a.pdf
5. Pacific Northwest National Laboratory. (n.d.). *Insulation Quality Installation*. Retrieved October 14, 2026, from https://basc.pnnl.gov/building-science-measures/insulation-quality-installation
6. U.S. Department of Energy. (2021). *Consumer Guide to Air Sealing the Home*. https://www.energy.gov/sites/default/files/2021-08/ES-Air%20Sealing_080421.pdf
7. City of Raleigh. (2026, February 11). *Failing an Inspection: Residential Projects*. https://raleighnc.gov/permits/services/failing-inspection-residential-projects